TCMU_DEV_BIT_TMR_NOTIFY
if (!test_bit(TCMU_DEV_BIT_TMR_NOTIFY, &udev->flags))
test_bit(TCMU_DEV_BIT_TMR_NOTIFY, &udev->flags));
set_bit(TCMU_DEV_BIT_TMR_NOTIFY, &udev->flags);
clear_bit(TCMU_DEV_BIT_TMR_NOTIFY, &udev->flags);